thread cross bit,taper cross bit, 1)Dia of cross bit:29-100mm 2)tip size:12x8,14x8,16x10,16x13,20x12,7x8 3Weight: 0.25-1. thread cross bit,taper cross bitmining bitcross bit X-drill bit 1.tapered connection;6°.7°.11°.12° 2.threaded connection;R25.R28.R32.T38.T38.T45.T51 3.packaging in wooden or plastic box 4.diameter;36mm.38mm.40mm.42mm.50mm.45mm.48mm.60mm.65mm76mm.89mm.